Re: [PATCH v2] mm: add a low limit to alloc_large_system_hash

[David Miller]

From: Eric Dumazet <eric.dumazet@xxxxxxxxx>
Date: Mon, 27 Feb 2012 07:03:17 +0100

> UDP stack needs a minimum hash size value for proper operation and also
> uses alloc_large_system_hash() for proper NUMA distribution of its hash
> tables and automatic sizing depending on available system memory.
> 
> On some low memory situations, udp_table_init() must ignore the
> alloc_large_system_hash() result and reallocs a bigger memory area.
> 
> As we cannot easily free old hash table, we leak it and kmemleak can
> issue a warning.
> 
> This patch adds a low limit parameter to alloc_large_system_hash() to
> solve this problem.
> 
> We then specify UDP_HTABLE_SIZE_MIN for UDP/UDPLite hash table
> allocation.
> 
> Reported-by: Mark Asselstine <mark.asselstine@xxxxxxxxxxxxx>
> Reported-by: Tim Bird <tim.bird@xxxxxxxxxxx>
> Signed-off-by: Eric Dumazet <eric.dumazet@xxxxxxxxx>

Acked-by: David S. Miller <davem@xxxxxxxxxxxxx>

Who wants to take this?

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/